ANTIOCH — A major-injury collision involving several vehicles shut down Highway 4 in Antioch late Monday night, according to the California Highway Patrol.
The crash was reported in westbound lanes just east of Hillcrest Avenue at about 10:35 p.m., said CHP Officer Damian Cistaro.

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Cistaro said the collision involved at least three vehicles and resulted in major injuries.
Three helicopters were dispatched to the scene.
The CHP shut down the highway at about 10:45 p.m. At least one lane was expected to reopen shortly before midnight, Cistaro said.
Check back for updates.